I generally look at it all over the place then attempt to pile it into one or another toy box and try and push the lid down. It's a nightmare. Just had his 4th birthday and more expensive plastic cr*p has been bought for him. I bought him one toy. I know that sounds mean but he got loads anyway! Plus, I'm the one who has to tidy up! Back to the point, give some to charity, put some on Ebay, give some to children's wards in hospital. It may mean stealing from your son when he's not looking, but at least your house will be tidy and you will have done your bit!!